You can apply to stay in the UK as a stateless person if you’re not recognised as a citizen of any country.
To be eligible to apply, you must also be:
in the UK or be unable to return to another country as a result of being stateless
If you can’t return to another country because you fear persecution there, you should claim asylum first.
If you've already claimed asylum or have an outstanding human rights claim, you must wait until you have a decision. You can apply to stay as a stateless person if it’s refused.